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Space Telescope Imaging Spectrograph
STIS-03

ACTIVITY TITLE: STIS Science Data Buffer Check with Self-test.

ID: STIS-03

APPLICABLE SMOV REQUIREMENTS: L.10.4.5.1.5

DESCRIPTION: The STIS Science Buffer RAM is checked for bit flips during SAA passages. A Control Section (CS) self-test consisting of writing/reading a specified bit pattern from each memory location in Buffer RAM follows this. The CS Buffer RAM self-test as well as the bit flip tests are all done with the CS in Operate.

Using the set buffer memory macro, write zeros into CS Buffer RAM prior to passage into the SAA and then dump buffer memory to SSR after exit from the SAA to check for bit flips. Then use the CS self test macro to conduct a pattern test of CS Buffer RAM and check the memory fail counter after the test has completed.

IMPLEMENTATION METHOD: Stored commanding

DEPENDENCIES: Should be sequenced after STIS-02.

DURATION: 3600 s (2 Orbits internal parallel)

DATA REQUIREMENTS: 32 Mbits

ANALYSES & EXPECTED RESULTS: Comparisons of the memory dumps and exposures will be done with the expected images and against each other.

COMMENTS: proposal 11348, PI Alan Welty

AUTHOR/telephone/email: Alan Welty/410-338/4948/welty@stsci.edu

DATE: September 22, 2007